Heat exchange system



Nov. 8, 1938. M. E.HANSON HEAT EXCHANGE SYSTEM Filed June 20, 1936 2 Sheets-Sheet l ,izweflfow M/L TON E. HANSON 1 W J. G

Nov. 8, 1938. M. E. HANSON HEAT EXCHANGE SYSTEM 7 2 Sheets-Sheet 2 Filed June 20, 1936 affaqiwgy Patented Nov. 8, 1938 UNITED STATES 2,136,132 HEAT EXCHANGE SYSTEM Milton E. Hanson, Collingswood, N. J., assignor to B. F. Sturtevant Company, Boston, Mass.

Application June 20, 1936, Serial 'No. 86,403

1 Claim.

This invention relates to heating systems and relates more particularly to heating systems for rapid transit cars.

The heating of rapid transit cars in the past has been accomplished by means of electric heating coils placed under or adjacent the car seats, the only air circulation being thermal, no fans or blowersbeing associated with the sources of heat. Such installations have been unsatisfactory due to unevenheat distribution and to inadequate ventilation.

There has recently been a change in design of rapid transit cars resulting in better appearance, increased riding comfort and reduced operating expense. The new cars have the so called stream-line contours. An' object of this invention is to provide an improved heating system for rapid transit cars.

Another object of the invention is to provide heating units including blowers which may be placed beneath the floor of a new design rapid transit car and to cooperate with the curved walls of the car to provide an inconspicuous as well as a compact efllcient heating system.

Other objects of the invention will be apparent from the following description taken together with the drawings.

The invention will now be described with reference to the drawings of which:

Fig. 1 is a sectional plan view looking downwardly upon a car equipped according to this invention, with the heating apparatus in dotted outline;

Fig. 2 is a side view of one end of the car 35 of Fig. 1, showing one heating unit in dotted outline, and

Fig. 3 is a transverse section along the lines 33 of Fig. 1. n

In the car illustrated by the drawings there are provided four heating and ventilating units, one in each comer of the car. These units comprise the blower ,6 driven by the motor I, the fresh air inlet chamber 8, the fresh air'inlet 9 in the lower curved wall of the car, the heat ex- 45 change members or coils III in the air tempering compartment ll, andthe discharge outlet it into the duct II. The entire assembly is :hung beneath the car floor I l.

- passage, the air tempering passage discharging 1 into a duct running at right angles thereto, a compact unit conforming with the outline of the car is provided completely below the floor.

A volume of air equal to that of the fresh air drawn into the units is discharged from the car 15' through the usual exhaust outlets.

The heat exchanger I 0 may be electric or steam heating'elements or may be coils through which a refrigerant may be circulated for cooling.

While one embodiment of the invention has 20 been described for the purpose of illustration,

it should be understood that the invention is not to be limited to the exact arrangement described, as many departures and modifications will suggest themselves to those skilled in the art, after having had access to this disclosure.

What is claimed is: Heat exchange apparatus comprising in combination, a railway passenger car having a floor and side walls extending below the floor, a centrlfugal fan having an axial inlet and having an involute casing with a tangential outlet mounted underneath said floor of said car, means in and conforming to the contour of one of said walls forming a fresh air-inlet into said car, means forming a converging air passage from said fresh air inlet to said inlet of said fan, means formin an air tempering passage connecting with said outlet and extending substantially at right angles to the direction of air flow through said outlet, air tempering means in said tempering passage, and means forming a substantially vertical air exhaust passage extending from said tempering passage through said floor into said car at. a P int substantially above said fresh air inlet. I

MILTON E. HANSON; 

